Home / 19,770.96-27,295.08-15,779.28

Finding the Fourth Proportional to 19,770.96, 27,295.08 and 15,779.28

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Solution

The fourth proportional to 19,770.96, 27,295.08 and 15,779.28 is: 21,784.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,770.96 : 27,295.08 = 15,779.28 : x
  2. Step 2: Convert to fraction form
    19,770.96/27,295.08 = 15,779.28/x
  3. Step 3: Cross multiply
    19,770.96x = 27,295.08 × 15,779.28
  4. Step 4: Simplify right side
    19,770.96x = 430,696,709.94
  5. Step 5: Solve for x
    x = 430,696,709.94/19,770.96
  6. Step 6: Final answer
    x = 21,784.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.